I have to make a chat web app. using only servlets. So all the display part is done using pw.println() on the response.
Now the issue is i want the text area to scroll down automatically as soon a i enter the message which in appended to the text area each time i submit the message.
The way to control the behavior of the browser display is with code on the browser side - ie JavaScript. Using JavaScript to get fresh data from the server side to modify the display is commonly called AJAX style programming. Go see our HTML and JavaScript forum.